I'm 35 (was 34 when I got COVID last August). It barely touched me, other than a nearly two-week long total loss of taste and smell. I've had bouts with the flu, even colds where I felt way worse, and for longer. Only really noticed the cough at night for about a week.
It put my fiancee, also 34 at the time (she's 4 months older than me) into the hospital for 4 days, although she never had any severe breathing problems she had extreme weakness/lethargy and wild blood pressure fluctuations. It also sent her into kidney failure and she is now on dialysis (granted, she had some preexisting conditions that predisposed her to kidney issues, but her function levels were holding their own before COVID).
My friend Dan, a year older and a heavier guy, was in a coma on a ventilator for almost two weeks, nearly died, and still deals with lingering shortness of breath and weakness. He got it early in the pandemic (late March of 2020) when hardly anything was known about COVID-19, let alone how to treat severe cases, so he was lucky to survive.